Date   

Re: [Elecraft_K3] K144XV Mods?

David Pratt
 

Very interesting, Matt.  Have your suggested modifications to the K144XV been incorporated in the latest units supplied by Elecraft?  If not, why not?

73 de David G4DMP

+ - - - - - - - - - - - - - - - - - - - - - +
| David M Pratt, Kippax, Leeds, UK  |
+ - - - - - - - - - - - - - - - - - - - - - +

On 20 Sep 2017, at 01:14, matt421@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Anyone have any thoughts on these mods?


http://www.qsl.net/dh1dm/k144xv_txmod/index.html


I do see intermittent low output power (about one out of 10 TX cycles). Tweaking the power control brings it right back. This is running MSK144 on 2 Meters.


Thanks,

Matt

N2IDW





K144XV Mods?

matt421
 

Anyone have any thoughts on these mods?


http://www.qsl.net/dh1dm/k144xv_txmod/index.html


I do see intermittent low output power (about one out of 10 TX cycles). Tweaking the power control brings it right back. This is running MSK144 on 2 Meters.


Thanks,

Matt

N2IDW





FT8 for low bands (was: 630 meter band open for use)

Joe Subich, W4TV
 

On 9/16/2017 10:44 PM, Rob Sherwood. rob@nc0b.com [Elecraft_K3] wrote:

FT8 can work down to 20 dB below band noise, but I think most QSOs
are way stronger than that.
FT8 can work to 20 dB below band noise *IN A 2.5 KHZ BANDWIDTH*.
That's quite different than a CW SNR of -20 dB.

If one considers the detection bandwidth for CW (composite of the
receiver filtering and "ear/brain filtering") to be between 50 and
100 Hz for a "good" ear and require a 1 dB SNR, CW can work to about
15 dB below band noise in a 2500 Hz bandwidth.

FT8 (as well as JT65 and JT9) will certainly outperform CW but not
to the extent that the -21, -25 and -27 dB respectively SNR thresholds
would indicate. Assuming that the bandwidth of the software "tone
filters" are around 5 Hz and that they require 3 dB SNR in the FFT
"bin", the basic tone detection capability of these modes is about
10 dB better than the human ear/brain combination.

FT8/JT65/JT9 all use various encoding/error correcting techniques in
addition to the narrow software filtering. The error correction allows
minimum SNR thresholds to approach the difference in the absolute filter
bandwidth (which is proportional to the baud rate) for each mode.

The bottom line is that FT8/JT65/JT9 will outperform CW by between 10
and 15 dB in most cases *with Gaussian noise*. The difference can be
more or less depending on the type of noise, fading, multi-path and/or
interference.

73,

... Joe, W4TV


On 9/16/2017 10:44 PM, Rob Sherwood. rob@nc0b.com [Elecraft_K3] wrote:
Hi Jim,
Thank you for your input. I hope that means most hams will have a shot at using at least the 600m band. I need to haul my GR 916A RF bridge out to my 160 meter Marconi T antenna and measure the Z on 600m.
My IC-7300 tunes down to 30 kHz, but I have no idea how to get signal out below 160 meters. Maybe the upcoming IC-7610 will be more practical. I know some TS-590 users are getting output at least on 600m.
On another subject, last week for the first time I downloaded WSJT-X which supports FT8. I cannot believe the number of stations on FT8. I worked DX on 40 through 15 meters with signals strong enough to have been on CW and likely SSB. FT8 can work down to 20 dB below band noise, but I think most QSOs are way stronger than that. I saw stations on FT8 S9+10 on my mobile. FT8 might be a perfect mode for 600 meters. Do you know if any of the hams with special permission to use the band have tried FT8?
Rob, NC0B


Re: [Elecraft_K3] 630 meter band open for use

Rob Sherwood
 

It seems the 15 second turnaround time of FT8 is a big plus.  It is only marginally less efficient than JT65.  Would seem a natural for 630 meters.  

Now the question is are there any commercial solid state amps that out of the box work on 630 meters?   

How do we calculate ERP of 5 watts?   I can measure the Z of my 160 meter antenna with my GR 916A RF bridge.  Maybe a NEC simulation can estimate my radiation resistance and ground losses.  

Rob, NC0B


On Sep 16, 2017, at 10:42 PM, 'James F. Boehner MD' jboehner01@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

I haven’t heard any reports of FT8 being used by the experimental stations, but I know that WSPR is popular.

 

But, it’s only a matter of time!

 

’73 de JIM N2ZZ

 




Do you know if any of the hams with special permission to use the band have tried FT8?

 

Rob, NC0B

 

 

 

 



If this email is spam, report it to www.OnlyMyEmail.com


630 meter band open for use

James F. Boehner, MD
 

I haven’t heard any reports of FT8 being used by the experimental stations, but I know that WSPR is popular.

 

But, it’s only a matter of time!

 

’73 de JIM N2ZZ

 




Do you know if any of the hams with special permission to use the band have tried FT8?

 

Rob, NC0B

 

 

 

 


Re: [Elecraft_K3] 630 meter band open for use

Rob Sherwood
 

Hi Jim,

Thank you for your input.  I hope that means most hams will have a shot at using at least the 600m band.  I need to haul my GR 916A RF bridge out to my 160 meter Marconi T antenna and measure the Z on 600m. 

 My IC-7300 tunes down to 30 kHz, but I have no idea how to get signal out below 160 meters.  Maybe the upcoming IC-7610 will be more practical. I know some TS-590 users are getting output at least on 600m.

On another subject, last week for the first time I downloaded WSJT-X which supports FT8.  I cannot believe the number of stations on FT8.  I worked DX on 40 through 15 meters with signals strong enough to have been on CW and likely SSB.  FT8 can work down to 20 dB below band noise, but I think most QSOs are way stronger than that. I saw stations on FT8 S9+10 on my mobile.  FT8 might be a perfect mode for 600 meters.  Do you know if any of the hams with special permission to use the band have tried FT8?

Rob, NC0B





On Sep 16, 2017, at 8:15 PM, 'James F. Boehner MD' jboehner01@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Rob,

 

The March 29th FCC Report and Order in regards to the new bands can be found here:

 

https://apps.fcc.gov/edocs_public/attachmatch/FCC-17-33A1.pdf

 

Number 14 states:

 

14. Separation Distance. As proposed, we will permit amateur stations to operate in the

135.7-137.8 kHz and 472-479 kHz bands when separated by a specified distance from electric power

transmission lines with PLC systems that use the same bands. To support the operations of both the

amateur service and PLC systems in these bands, we adopt a minimum horizontal separation distance of

one kilometer between the transmission line and the amateur station when operating in these bands.

 

So, they specifically mark the distance as 1 km between the amateur radio station and a transmission line carrying PLC data. Implied but not stated is that the PLC signals that are of concern are those that control the power grid.  I’m not sure where the VLF meter reading concern came from, but that is not part of, and does not support the intent of the FCC R&O on my read.

 

If this is purely a question of definition, analogous to an HOA prohibiting all transmitting equipment but allow RF key fobs and Cellphones, I won’t be able to address the question.  Perhaps there are some on this reflector that can do so.

 

The implementation of the R&O is the document to which we have been referring:

 

http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-893A1.pdf

 

I hope this comes close to answering your question.

 

’73 de JIM N2ZZ

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Saturday, September 16, 2017 9:38 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] 630 meter band open for use

 




I files today, but I don't understand the specification of being 1 KM from a power company system.  Does that mean if everyone in a whole city has VLF meter reading everyone will be rejected?  

 

Rob, NC0B

 



On Sep 16, 2017, at 7:19 PM, 'Reg Boudinot' reg@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

We have to wait 30 days after filing the form before we begin operation.  I submitted the form yesterday and now I am waiting and hoping not to hear from the UTC.

 

The FCC order says that once we file then any future utility implementations in our area must avoid using the frequencies for which we file.  That says we should file now to protect the bands while we build antennas, etc.

 

Reg

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, September 15, 2017 1:37 PM
To: elecraft@...
Cc: Elecraft_K3@...
Subject: [Elecraft_K3] 630 meter band open for use

 

 

Since the availability of the 630 meter band was mentioned, I wanted to
pass along the link for amateurs to inform the UTC of intent to operate on
the new 2200 meter and 630 meter bands.

Recommendation is that EVERYONE submits this form ASAP, even if you don't
immediately intend to operate on the new frequency bands:

http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-89
3A1.pdf has an imbedded link to the UTC's online form. I just did mine and
got a confirmation that my submission was accepted.

'73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: elecraft-bounces@mailman..qth.net
[mailto:elecraft-bounces@...] On Behalf Of Merv Schweigert via
Elecraft
Sent: Friday, September 15, 2017 1:41 PM
To: elecraft@...
Subject: [Elecraft] 630 meter band open for use

Since we finally have the 630 meter band open for amateur use, (after you
file intent of operation with the UTC and wait 30 days),

is there any plan to put this band on the K3/K3S band plan?
Would sure be nice to be able to get to 630 with out going through the
settings to enable/disable etc.
Or publish a macro that could be used with PF1 or PF2 to engage the band
quickly.

73 Merv K9FD/KH6

__________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@...

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jboehner01@...


 


If this email is spam, report it to www.OnlyMyEmail.com






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630 meter band open for use

James F. Boehner, MD
 

Rob,

 

The March 29th FCC Report and Order in regards to the new bands can be found here:

 

https://apps.fcc.gov/edocs_public/attachmatch/FCC-17-33A1.pdf

 

Number 14 states:

 

14. Separation Distance. As proposed, we will permit amateur stations to operate in the

135.7-137.8 kHz and 472-479 kHz bands when separated by a specified distance from electric power

transmission lines with PLC systems that use the same bands. To support the operations of both the

amateur service and PLC systems in these bands, we adopt a minimum horizontal separation distance of

one kilometer between the transmission line and the amateur station when operating in these bands.

 

So, they specifically mark the distance as 1 km between the amateur radio station and a transmission line carrying PLC data. Implied but not stated is that the PLC signals that are of concern are those that control the power grid.  I’m not sure where the VLF meter reading concern came from, but that is not part of, and does not support the intent of the FCC R&O on my read.

 

If this is purely a question of definition, analogous to an HOA prohibiting all transmitting equipment but allow RF key fobs and Cellphones, I won’t be able to address the question.  Perhaps there are some on this reflector that can do so.

 

The implementation of the R&O is the document to which we have been referring:

 

http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-893A1.pdf

 

I hope this comes close to answering your question.

 

’73 de JIM N2ZZ

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Saturday, September 16, 2017 9:38 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] 630 meter band open for use

 




I files today, but I don't understand the specification of being 1 KM from a power company system.  Does that mean if everyone in a whole city has VLF meter reading everyone will be rejected?  

 

Rob, NC0B

 



On Sep 16, 2017, at 7:19 PM, 'Reg Boudinot' reg@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

We have to wait 30 days after filing the form before we begin operation.  I submitted the form yesterday and now I am waiting and hoping not to hear from the UTC.

 

The FCC order says that once we file then any future utility implementations in our area must avoid using the frequencies for which we file.  That says we should file now to protect the bands while we build antennas, etc.

 

Reg

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, September 15, 2017 1:37 PM
To: elecraft@...
Cc: Elecraft_K3@...
Subject: [Elecraft_K3] 630 meter band open for use

 

 

Since the availability of the 630 meter band was mentioned, I wanted to
pass along the link for amateurs to inform the UTC of intent to operate on
the new 2200 meter and 630 meter bands.

Recommendation is that EVERYONE submits this form ASAP, even if you don't
immediately intend to operate on the new frequency bands:

http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-89
3A1.pdf has an imbedded link to the UTC's online form. I just did mine and
got a confirmation that my submission was accepted.

'73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: elecraft-bounces@mailman..qth.net
[mailto:elecraft-bounces@...] On Behalf Of Merv Schweigert via
Elecraft
Sent: Friday, September 15, 2017 1:41 PM
To: elecraft@...
Subject: [Elecraft] 630 meter band open for use

Since we finally have the 630 meter band open for amateur use, (after you
file intent of operation with the UTC and wait 30 days),

is there any plan to put this band on the K3/K3S band plan?
Would sure be nice to be able to get to 630 with out going through the
settings to enable/disable etc.
Or publish a macro that could be used with PF1 or PF2 to engage the band
quickly.

73 Merv K9FD/KH6

__________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@...

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
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If this email is spam, report it to www.OnlyMyEmail.com





Re: [Elecraft_K3] 630 meter band open for use

Rob Sherwood
 

I files today, but I don't understand the specification of being 1 KM from a power company system.  Does that mean if everyone in a whole city has VLF meter reading everyone will be rejected?  

Rob, NC0B



On Sep 16, 2017, at 7:19 PM, 'Reg Boudinot' reg@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

We have to wait 30 days after filing the form before we begin operation.  I submitted the form yesterday and now I am waiting and hoping not to hear from the UTC.

 

The FCC order says that once we file then any future utility implementations in our area must avoid using the frequencies for which we file.  That says we should file now to protect the bands while we build antennas, etc.

 

Reg

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, September 15, 2017 1:37 PM
To: elecraft@...
Cc: Elecraft_K3@...
Subject: [Elecraft_K3] 630 meter band open for use

 

 

Since the availability of the 630 meter band was mentioned, I wanted to
pass along the link for amateurs to inform the UTC of intent to operate on
the new 2200 meter and 630 meter bands.

Recommendation is that EVERYONE submits this form ASAP, even if you don't
immediately intend to operate on the new frequency bands:

http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-89
3A1.pdf has an imbedded link to the UTC's online form. I just did mine and
got a confirmation that my submission was accepted.

'73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: elecraft-bounces@...
[mailto:elecraft-bounces@...] On Behalf Of Merv Schweigert via
Elecraft
Sent: Friday, September 15, 2017 1:41 PM
To: elecraft@...
Subject: [Elecraft] 630 meter band open for use

Since we finally have the 630 meter band open for amateur use, (after you
file intent of operation with the UTC and wait 30 days),

is there any plan to put this band on the K3/K3S band plan?
Would sure be nice to be able to get to 630 with out going through the
settings to enable/disable etc.
Or publish a macro that could be used with PF1 or PF2 to engage the band
quickly.

73 Merv K9FD/KH6

__________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@...

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
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.



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Re: [Elecraft_K3] Elecraft at Hamcon in Torrance, CA

 

We were both (unfortunately) tied up elsewhere. Thanks for stopping by!

Wayne
N6KR

On Sep 16, 2017, at 4:40 PM, prcradio@yahoo.com [Elecraft_K3] <Elecraft_K3@yahoogroups.com> wrote:


I visited the Elecraft display at Hamcon today and it was staffed with very knowledgeable people but where was Wayne and Eric???

Mike


Elecraft at Hamcon in Torrance, CA

Mike
 

I visited the Elecraft display at Hamcon today and it was staffed with very knowledgeable people but where was Wayne and Eric???

Mike


Re: [Elecraft_K3] 630 meter band open for use

Wes
 

That's my question.

First, for the last 2 months or so I've been plagued with severe powerline noise. (S9+20 on most bands)  My rural electric coop has a guy (a ham BTW) assigned to work these issues.  So far, while he agrees it's their problem, he can't pinpoint it.  He says the line crewmen who work with ask him why I don't just use use a cell phone like everyone else.

About a month ago another guy from the coop knocks on my door and announces that he is going to change my meter.  I knew they were using 3G to remotely read the existing meter.  He said that had been unreliable so they were going back to PLC meters.

So, they can interfere with me with impunity but I'll likely need their permission to possibly interfere with them.

Wes  N7WS


On 9/16/2017 10:19 AM, Rob Sherwood. rob@... [Elecraft_K3] wrote:
 

What specifically does the 1 KM spacing from a PLC system mean?  If a utility is reading your watt-hour meter in the VLF range, could that rule out a whole city? 

 

Rob, NC0B

The

Commission adopted a minimum horizontal separation

distance of one kilometer from

power line carrier (PLC) systems, which operate in the 9

-490 kHz range.

 

 



Re: [Elecraft_K3] 630 meter band open for use

Reg AA5GI
 

We have to wait 30 days after filing the form before we begin operation.  I submitted the form yesterday and now I am waiting and hoping not to hear from the UTC.

 

The FCC order says that once we file then any future utility implementations in our area must avoid using the frequencies for which we file.  That says we should file now to protect the bands while we build antennas, etc.

 

Reg

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, September 15, 2017 1:37 PM
To: elecraft@...
Cc: Elecraft_K3@...
Subject: [Elecraft_K3] 630 meter band open for use

 

 

Since the availability of the 630 meter band was mentioned, I wanted to
pass along the link for amateurs to inform the UTC of intent to operate on
the new 2200 meter and 630 meter bands.

Recommendation is that EVERYONE submits this form ASAP, even if you don't
immediately intend to operate on the new frequency bands:

http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-89
3A1.pdf has an imbedded link to the UTC's online form. I just did mine and
got a confirmation that my submission was accepted.

'73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: elecraft-bounces@...
[mailto:elecraft-bounces@...] On Behalf Of Merv Schweigert via
Elecraft
Sent: Friday, September 15, 2017 1:41 PM
To: elecraft@...
Subject: [Elecraft] 630 meter band open for use

Since we finally have the 630 meter band open for amateur use, (after you
file intent of operation with the UTC and wait 30 days),

is there any plan to put this band on the K3/K3S band plan?
Would sure be nice to be able to get to 630 with out going through the
settings to enable/disable etc.
Or publish a macro that could be used with PF1 or PF2 to engage the band
quickly.

73 Merv K9FD/KH6

__________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@...

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jboehner01@...

.


Re: [Elecraft_K3] 630 meter band open for use

Rob Sherwood
 

What specifically does the 1 KM spacing from a PLC system mean?  If a utility is reading your watt-hour meter in the VLF range, could that rule out a whole city? 

 

Rob, NC0B

The

Commission adopted a minimum horizontal separation

distance of one kilometer from

power line carrier (PLC) systems, which operate in the 9

-490 kHz range.

 

 

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, September 15, 2017 12:47 PM
To: elecraft@...
Cc: Elecraft_K3@...
Subject: [Elecraft_K3] 630 meter band open for use

 

 

Broken link. Try this one:

<http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-893A1.pdf>

'73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: elecraft-bounces@...
[mailto:elecraft-bounces@...] On Behalf Of Merv Schweigert via
Elecraft
Sent: Friday, September 15, 2017 1:41 PM
To: elecraft@...
Subject: [Elecraft] 630 meter band open for use

Since we finally have the 630 meter band open for amateur use, (after you
file intent of operation with the UTC and wait 30 days),

is there any plan to put this band on the K3/K3S band plan?
Would sure be nice to be able to get to 630 with out going through the
settings to enable/disable etc.
Or publish a macro that could be used with PF1 or PF2 to engage the band
quickly.

73 Merv K9FD/KH6

__________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@...

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jboehner01@...

..
__________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@...

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
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630 MHz transmit and receive using the K3S or a modified K3

James F. Boehner, MD
 

Thanks, Wayne!

These are exciting times!

’73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: Elecraft_K3@yahoogroups.com [mailto:Elecraft_K3@yahoogroups.com]
Sent: Friday, September 15, 2017 8:19 PM
To: elecraft_k3@yahoogroups.com
Subject: [Elecraft_K3] 630 MHz transmit and receive using the K3S or a modified K3

Here’s some info to get you started on 630 meters with the K3S or K3. For receive purposes, either transceiver is fully self-contained. For transmit, you’ll need an external amp of some kind.

RECEIVE

The K3S, or a modified K3, will receive on this band via the XVTR IN jack (or RX ANT IN). You’ll need:

- A KXV3 transverter interface module (standard with the K3S but optional for the K3)

- A KBPF3A filter module, or a KBPF3 with a small mod (see KBPF3MDKT). The KBPF3A mod kit also comes with a capacitor to be installed on the K3’s RF board to suppress LF noise.

RX performance is quite good on 630 meters.

Note: The XVTR IN and RX ANT IN jacks work on 630 meters (472 kHz) because both are post-TR switch. The TR switch has high-pass filtering that rolls off starting around 1 MHz, so you can’t use ANT 1 or ANT 2.

TRANSMIT

You can get a transmit signal out on 630 meters using the XVTR OUT jack (same requirements as above). Our initial tests shows about 0.5 milliwatts. In this case you’d use XVTR IN for receive, not RX ANT IN.

You’ll then need an external amplifier. It could be keyed using the rig’s KEY OUT jack. This signal could also be used to control a T/R switch if you needed to use the same antenna for both transmit and receive. If you use two different antennas, you’ll still have to cut the RX antenna off during TX, most likely.

Firmware configuration:

To use XVTR IN and OUT on this band, set up the radio for 160 meters, then set the CONFIG:KXV3 menu entry to TEST. This is necessary because 160 meter isn’t available as a transverter IF selection (yet).

73,
Wayne
N6KR




------------------------------------
Posted by: Wayne Burdick <n6kr@elecraft.com>
------------------------------------


------------------------------------

Yahoo Groups Links




.


630 MHz transmit and receive using the K3S or a modified K3

 

Here’s some info to get you started on 630 meters with the K3S or K3. For receive purposes, either transceiver is fully self-contained. For transmit, you’ll need an external amp of some kind.

RECEIVE

The K3S, or a modified K3, will receive on this band via the XVTR IN jack (or RX ANT IN). You’ll need:

- A KXV3 transverter interface module (standard with the K3S but optional for the K3)

- A KBPF3A filter module, or a KBPF3 with a small mod (see KBPF3MDKT). The KBPF3A mod kit also comes with a capacitor to be installed on the K3’s RF board to suppress LF noise.

RX performance is quite good on 630 meters.

Note: The XVTR IN and RX ANT IN jacks work on 630 meters (472 kHz) because both are post-TR switch. The TR switch has high-pass filtering that rolls off starting around 1 MHz, so you can’t use ANT 1 or ANT 2.

TRANSMIT

You can get a transmit signal out on 630 meters using the XVTR OUT jack (same requirements as above). Our initial tests shows about 0.5 milliwatts. In this case you’d use XVTR IN for receive, not RX ANT IN.

You’ll then need an external amplifier. It could be keyed using the rig’s KEY OUT jack. This signal could also be used to control a T/R switch if you needed to use the same antenna for both transmit and receive. If you use two different antennas, you’ll still have to cut the RX antenna off during TX, most likely.

Firmware configuration:

To use XVTR IN and OUT on this band, set up the radio for 160 meters, then set the CONFIG:KXV3 menu entry to TEST. This is necessary because 160 meter isn’t available as a transverter IF selection (yet).

73,
Wayne
N6KR


Re: [Elecraft_K3] 630 meter band open for use

Carl Moreschi
 

Thanks for posting this. I just sent my application in also. I have an antenna and transmitter for over a year waiting to get on 472 kHz. I have a 1000 foot dipole at 50 feet and a 60 watt CW transmitter. It's going to be interesting.

Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com

On 9/15/2017 2:37 PM, 'James F. Boehner MD' jboehner01@yahoo.com [Elecraft_K3] wrote:
Since the availability of the 630 meter band was mentioned, I wanted to
pass along the link for amateurs to inform the UTC of intent to operate on
the new 2200 meter and 630 meter bands.

Recommendation is that EVERYONE submits this form ASAP, even if you don't
immediately intend to operate on the new frequency bands:

http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-89
3A1.pdf has an imbedded link to the UTC's online form. I just did mine and
got a confirmation that my submission was accepted.

'73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: elecraft-bounces@mailman.qth.net
[mailto:elecraft-bounces@mailman.qth.net] On Behalf Of Merv Schweigert via
Elecraft
Sent: Friday, September 15, 2017 1:41 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] 630 meter band open for use

Since we finally have the 630 meter band open for amateur use, (after you
file intent of operation with the UTC and wait 30 days),

is there any plan to put this band on the K3/K3S band plan?
Would sure be nice to be able to get to 630 with out going through the
settings to enable/disable etc.
Or publish a macro that could be used with PF1 or PF2 to engage the band
quickly.

73 Merv K9FD/KH6

__________________________________________________________
Elecraft mailing list
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Help: http://mailman.qth.net/mmfaq.htm
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Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jboehner01@yahoo.com

.


Re: [Elecraft_K3] 630 meter band open for use

Mel Farrer <farrerfolks@...>
 

I just submitted and it went through fine.

Mel, K6KBE



From: "'James F. Boehner MD' jboehner01@... [Elecraft_K3]" To: elecraft@...
Cc: Elecraft_K3@...
Sent: Friday, September 15, 2017 11:47 AM
Subject: [Elecraft_K3] 630 meter band open for use

 
Broken link. Try this one:

93A1.pdf>

'73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: elecraft-bounces@...
[mailto:elecraft-bounces@...] On Behalf Of Merv Schweigert via
Elecraft
Sent: Friday, September 15, 2017 1:41 PM
To: elecraft@...
Subject: [Elecraft] 630 meter band open for use

Since we finally have the 630 meter band open for amateur use, (after you
file intent of operation with the UTC and wait 30 days),

is there any plan to put this band on the K3/K3S band plan?
Would sure be nice to be able to get to 630 with out going through the
settings to enable/disable etc.
Or publish a macro that could be used with PF1 or PF2 to engage the band
quickly.

73 Merv K9FD/KH6

__________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@...

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jboehner01@...

..
__________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@...

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jboehner01@...

.



630 meter band open for use

James F. Boehner, MD
 

Broken link. Try this one:

<http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-8
93A1.pdf>


'73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: elecraft-bounces@mailman.qth.net
[mailto:elecraft-bounces@mailman.qth.net] On Behalf Of Merv Schweigert via
Elecraft
Sent: Friday, September 15, 2017 1:41 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] 630 meter band open for use

Since we finally have the 630 meter band open for amateur use, (after you
file intent of operation with the UTC and wait 30 days),

is there any plan to put this band on the K3/K3S band plan?
Would sure be nice to be able to get to 630 with out going through the
settings to enable/disable etc.
Or publish a macro that could be used with PF1 or PF2 to engage the band
quickly.

73 Merv K9FD/KH6




______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jboehner01@yahoo.com


..
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jboehner01@yahoo.com


.


630 meter band open for use

James F. Boehner, MD
 

Since the availability of the 630 meter band was mentioned, I wanted to
pass along the link for amateurs to inform the UTC of intent to operate on
the new 2200 meter and 630 meter bands.

Recommendation is that EVERYONE submits this form ASAP, even if you don't
immediately intend to operate on the new frequency bands:

http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0915/DA-17-89
3A1.pdf has an imbedded link to the UTC's online form. I just did mine and
got a confirmation that my submission was accepted.


'73 de JIM N2ZZ
Elecraft_K3 Listowner

-----Original Message-----
From: elecraft-bounces@mailman.qth.net
[mailto:elecraft-bounces@mailman.qth.net] On Behalf Of Merv Schweigert via
Elecraft
Sent: Friday, September 15, 2017 1:41 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] 630 meter band open for use

Since we finally have the 630 meter band open for amateur use, (after you
file intent of operation with the UTC and wait 30 days),

is there any plan to put this band on the K3/K3S band plan?
Would sure be nice to be able to get to 630 with out going through the
settings to enable/disable etc.
Or publish a macro that could be used with PF1 or PF2 to engage the band
quickly.

73 Merv K9FD/KH6




______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jboehner01@yahoo.com


.


Re: [Elecraft_K3] Re: K3 Jumps To High Output In Data Mode During Power Knob Rotation

Bob Hallock
 

My K3 does this also.
Bob K7TM

On Tue, Sep 5, 2017 at 2:55 PM, Dennis Moore dennis@... [Elecraft_K3] <Elecraft_K3@...> wrote:
 

I don't that's what was meant. I read it to mean that the power level
indicated 150 even though the power was probably set at whatever was
proper at the point he stopped turning the PWR knob. I haven't seen this
on my K3.

73, Dennis NJ6G

On 9/4/2017 05:21, W1AJT@... [Elecraft_K3] wrote:
>
> K3 does not put out 150w.
>
>
> Art - VE3UTT / W1AJT


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